https://www.theguardian.com/technology/2018/may/01/facebook-mark-zuckerberg-unveils-privacy-tool-clear-history

New control, which will let users erase ‘what you’ve clicked on’ and ‘website you’ve visited’, comes as Zuckerberg battles bad publicity

Mark Zuckerberg unveiled a new Facebook privacy control called “clear history” at the social media company’s annual developer conference, and admitted that he “didn’t have clear enough answers” about data control when he recently testified before Congress.